I have been reading all over the net for a week but have not found information related to the effects of regular window pane glass on a 5.56/.223 round. I am planning to acquire a small carbine dedicated to indoor only home defense and want to minimize risk to my neighbors who live 15->30 yards away. The problem is that my house has more windows around the perimeter than brick/wallboard so I am concerned about collateral damage.
The question: Is there a 5.56/.223 round that would be at least as safe as other common home defense types when shot through standard window glass (9mm, .40, .45, 00 Buck etc)? I am looking for the best balance of performance/safety.
As an alternate option, I am also considering a house carbine in either 9mm or 5.7x28 but I didn't find information on the effects on glass on these either. I am open to SBR'ing an AR but would prefer to stay at 16" to avoid paperwork.
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